Preliminary communication

Chemical sulfatization of chrome-containing sludges from DUBERSAY tailing dump

E. Tastanov ; Satbayev University, Institute, of Metallurgy and Ore Beneficiation, Almaty, Kazakhstan
A. Ultarakova orcid.org/0000-0001-9428-8508 ; Satbayev University, Institute, of Metallurgy and Ore Beneficiation, Almaty, Kazakhstan
E. Kuldeyev ; Satbayev University, Institute, of Metallurgy and Ore Beneficiation, Almaty, Kazakhstan
N. Sadykov ; Satbayev University, Institute, of Metallurgy and Ore Beneficiation, Almaty, Kazakhstan
Zh. Yerzhanova orcid.org/0000-0003-3917-1600 ; Satbayev University, Institute, of Metallurgy and Ore Beneficiation, Almaty, Kazakhstan
A. Tastanova orcid.org/0000-0003-1953-8938 ; Satbayev University, Institute, of Metallurgy and Ore Beneficiation, Almaty, Kazakhstan

Abstract

Waste chromium production sludge from the Dubersay tailings dump is present in huge quantities with a magnesium oxide content of up to 40 %. The chrome-containing waste was sintered at 1 100 °C, the resulting sinter was mixed with sulphuric acid when heated to 300 °C. The resulting mixture after heating was leached with water at 90 °C, the solid precipitate was washed and dried to yield a chrome concentrate containing 55,4 % Cr₂O₃, 8,2 % SiO₂. Evaporation of the purified solution produces magnesium sulphate which is a magnesium fertilizer.

Keywords

chromium oxide; sludge tailings; chromium concentrate; sintering; X-ray research

Hrčak ID:

307436

URI

https://hrcak.srce.hr/307436

Publication date:

1.1.2024.

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